linux-kernel - Re: [PATCH 3/3] Revert "drm/amd/amdgpu: switch on/off vcn power profile mode"

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Date:   Mon, 14 Aug 2023 11:20:56 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Arvind Yadav <Arvind.Yadav@....com>
Cc:     Christian.Koenig@....com, alexander.deucher@....com,
        shashank.sharma@....com, Xinhui.Pan@....com, airlied@...il.com,
        daniel@...ll.ch, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] Revert "drm/amd/amdgpu: switch on/off vcn power
 profile mode"

KFD also changes the profile when queues are active.  Please make sure
that is properly taken into account as well.

Alex

On Mon, Aug 14, 2023 at 3:36 AM Arvind Yadav <Arvind.Yadav@....com> wrote:
>
> This reverts commit 5ce71f59bb9bd3d8a09b96afdbc92975cb6dc303.
>
> Reason for revert: New amdgpu_smu* api is added to switch
> on/off profile mode. These new api will allow to change the
> GPU power profile based on a submitted job.
>
> Cc: Shashank Sharma <shashank.sharma@....com>
> Cc: Christian Koenig <christian.koenig@....com>
> Cc: Alex Deucher <alexander.deucher@....com>
> Signed-off-by: Arvind Yadav <Arvind.Yadav@....com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c | 14 ++------------
>  1 file changed, 2 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
> index 2d94f1b63bd6..70777fcfa626 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
> @@ -363,7 +363,6 @@ static void amdgpu_vcn_idle_work_handler(struct work_struct *work)
>                 container_of(work, struct amdgpu_device, vcn.idle_work.work);
>         unsigned int fences = 0, fence[AMDGPU_MAX_VCN_INSTANCES] = {0};
>         unsigned int i, j;
> -       int r = 0;
>
>         for (j = 0; j < adev->vcn.num_vcn_inst; ++j) {
>                 if (adev->vcn.harvest_config & (1 << j))
> @@ -392,10 +391,6 @@ static void amdgpu_vcn_idle_work_handler(struct work_struct *work)
>         if (!fences && !atomic_read(&adev->vcn.total_submission_cnt)) {
>                 amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_VCN,
>                        AMD_PG_STATE_GATE);
> -               r = amdgpu_dpm_switch_power_profile(adev, PP_SMC_POWER_PROFILE_VIDEO,
> -                               false);
> -               if (r)
> -                       dev_warn(adev->dev, "(%d) failed to disable video power profile mode\n", r);
>         } else {
>                 schedule_delayed_work(&adev->vcn.idle_work, VCN_IDLE_TIMEOUT);
>         }
> @@ -404,16 +399,11 @@ static void amdgpu_vcn_idle_work_handler(struct work_struct *work)
>  void amdgpu_vcn_ring_begin_use(struct amdgpu_ring *ring)
>  {
>         struct amdgpu_device *adev = ring->adev;
> -       int r = 0;
>
>         atomic_inc(&adev->vcn.total_submission_cnt);
>
> -       if (!cancel_delayed_work_sync(&adev->vcn.idle_work)) {
> -               r = amdgpu_dpm_switch_power_profile(adev, PP_SMC_POWER_PROFILE_VIDEO,
> -                               true);
> -               if (r)
> -                       dev_warn(adev->dev, "(%d) failed to switch to video power profile mode\n", r);
> -       }
> +       if (!cancel_delayed_work_sync(&adev->vcn.idle_work))
> +               amdgpu_gfx_off_ctrl(adev, false);
>
>         mutex_lock(&adev->vcn.vcn_pg_lock);
>         amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_VCN,
> --
> 2.34.1
>